#include <stdio.h>
#include <stdlib.h>

int main()
{
    int n,m;
    scanf("%d%d",&n,&m);
    switch(m)
    {
     case 1:
     case 3:
     case 5:
     case 7:
     case 8:
     case 10:
     case 12:
        printf("31");
        break;
     case 4:
     case 6:
     case 9:
     case 11:
        printf("30");
        break;
     case 2:
        if((n%4==0&&n%100!=0)||(n%400==0))
            printf("29");
        else printf("28");
        break;
    default:printf("error");
    }
    return 0;
}
